In Doug's defense the love letters mean nothing other than the attraction system being totally ridiculous and not indicative of genuine attraction. As for the attempt to cuddle, I don't think there was anything romantic in that either. I have seen sims of the same gender, whose gender preferences were completely straight (checked with MC), cuddling on benches at the park. I have even had an NPC firefighter sit next to one of my sims and cuddle up and there was no attempt on the NPC's part to take it any further or to even interact with my sim when I extricated them.